package com.test.google.app.common;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

public class RedirectFilter implements Filter {
	
	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
			throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		String redirectFrom = SysSetting.getRedirectFrom();
		String redirectTo = SysSetting.getRedirectTo();
		if (StringUtils.isNotBlank(redirectFrom) && StringUtils.isNotBlank(redirectTo)) {
			String uri = request.getRequestURI();
			if (!redirectFrom.startsWith("/")) {
				redirectFrom = "/" + redirectFrom;
			}
			if (!redirectFrom.endsWith("/")) {
				redirectFrom = redirectFrom + "/";
			}
			if (!uri.endsWith("/")) {
				uri = uri + "/";
			}
			if (uri.equalsIgnoreCase(redirectFrom) && StringUtils.isNotBlank(redirectTo)) {
//				request.getRequestDispatcher(redirectTo).forward(arg0, arg1);
				response.sendRedirect(redirectTo);
				return;
			}
		}
		arg2.doFilter(arg0, arg1);
	}
	

	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}

}
